To ensure consistent communication and compliance, all associates globally are expected to complete our Code of Conduct training on an annual basis on various aspects of our Code, including but not limited to human rights. Our Code of Conduct is available in over 20 languages and can be found at: https://www.avient.com/company/policies-and-governance/code-conduct Our Ethics Hotline is available 24 hours a day, 7 days a week, by phone or web, for our associates and the community to report any concerns or make inquiries. Those making reports can remain anonymous.

POLYONE I N V E S T O R P R E S E N T A T I O N J U N E 2 0 1 8 FORWARD LOOKING STATEMENTS PolyOne Corporation 2 In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. In addition, operating income before special items and adjusted EPS are components of various PolyOne annual and long-term employee incentive plans. • A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.polyone.com.

P l O I t P t tiPolyOne Investor Presentation KeyBanc Capital Markets Basic Materials & Packaging Conference September 2016p PolyOne Corporation Page 1 Forward-Looking Statements  In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. In addition, operating income before special items and adjusted EPS are components of various PolyOne annual and long-term employee incentive plans.  A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted p p p on our website at www.polyone.com.

You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. FULL YEAR 2023 ORGANIC * FX AS REPORTED Sales $3,240M 4.0% (0.9%) 3.1% Adj. Q4 2023 ORGANIC * FX AS REPORTED Sales $747M 4.8% (1.0%) 3.8% Adj.

Factors that could cause actual results to differ materially from those implied by these forward-looking statements include, but are not limited to: • Disruptions, uncertainty or volatility in the credit markets that could adversely impact the availability of credit already arranged and the availability and cost of credit in the future; • The effect on foreign operations of currency fluctuations, tariffs and other political, economic and regulatory risks; • Disruptions or inefficiencies in our supply chain, logistics, or operations; • Changes in laws and regulations in jurisdictions where we conduct business, including with respect to plastics and climate change; • Fluctuations in raw material prices, quality and supply, and in energy prices and supply; • Demand for our products and services; • Production outages or material costs associated with scheduled or unscheduled maintenance programs; • Unanticipated developments that could occur with respect to contingencies such as litigation and environmental matters; • Our ability to pay regular quarterly cash dividends and the amounts and timing of any future dividends; • Information systems failures and cyberattacks; • Amounts for cash and non-cash charges related to restructuring plans that may differ from original estimates, including because of timing changes associated with the underlying actions; • Our ability to achieve strategic objectives and successfully integrate acquisitions, including the implementation of a cloud-based enterprise resource planning system, S/4HANA; • Other factors affecting our business beyond our control, including without limitation, changes in the general economy, changes in interest rates, changes in the rate of inflation, geopolitical conflicts and any recessionary conditions; and • Other factors described in our Annual Report on Form 10-K for the year ended December 31, 2023 under Item 1A, “Risk Factors.” You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. In addition, operating income before the effect of special items is a component of Avient’s annual incentive plans and is used in debt covenant computations.

You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. SUSTAINABILITY • Most recent Sustainability report substantially expanded disclosure on key environmental and social topics. • Aligned with leading reporting frameworks – GRI, SASB, TCFD. Full conformance will be built over subsequent reporting cycles. • Published 2030 performance goals, further enhancing our position as a responsible business creating sustainable, long-term value for its stakeholders. • Scope included legacy PolyOne operations.

PolyOne Corporation Page 1 PolyOne Investor Presentation RW Baird 2015 Industrial Conference November 2015 PolyOne Corporation Page 2 Forward-Looking Statements  In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. In addition, operating income before special items and adjusted EPS are components of various PolyOne annual and long-term employee incentive plans.  A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.polyone.com.

Investor Day POLYONE I N V E S T O R P R E S E N T A T I O N M A R C H 2 0 1 8 FORWARD LOOKING STATEMENTS PolyOne Corporation 2 In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. In addition, operating income before special items and adjusted EPS are components of various PolyOne annual and long-term employee incentive plans. • A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.polyone.com.

PolyOne Corporation Page 1 PolyOne Investor Presentation Credit Suisse Boston Basic Materials Conference June 2015 PolyOne Corporation Page 2 Forward-Looking Statements  In this presentation, statements that are not reported financial results or other historical information are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. You are advised to consult any further disclosures we make on related subjects in our reports on Form 10-Q, 8-K and 10-K that we provide to the Securities and Exchange Commission. In addition, operating income before special items and adjusted EPS are components of various PolyOne annual and long-term employee incentive plans.  A reconciliation of each non-GAAP financial measure with the most directly comparable GAAP financial measure is attached to this presentation which is posted on our website at www.polyone.com.

The company reported third quarter sales of $815.2 million compared to $753.7 million in the prior year quarter. For more information, visit https://www.avient.com. 4 Forward-looking Statements In this press release, statements that are not reported financial results or other historical information are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. In addition, operating income before the effect of special items is a component of Avient's annual incentive plans and is used in debt covenant computations.